Power battery classification and use

　　First, lead-acid batteries

　　It is currently the most widely used battery for electric vehicles, according to incomplete statistics, in the already produced electric

　　In automobiles, the proportion of lead-acid batteries is 90%, which is mainly due to its many advantages: development history

　　With a long history, the technology is more mature, the specific power is larger, and the cycle life can also reach 800~1000 times

　　Ben is lower. However, the specific energy of the lead-acid battery is very low, only about 40W·h/kg, and the fast charging technology is also

　　It is not yet mature (generally slow charge is more than 8 hours), and it is seriously polluted.

　　Second, lithium-ion batteries

　　Its specific energy and specific power are very high, up to 150W·h/kg and 1600W/kg, respectively, and cycle life

　　Long, about 1200 times, and the charging time is short, 2~4h, the use voltage can reach 4V, the use of safety

　　The sex is also relatively good. However, lithium-ion batteries have high price, poor fast charge and discharge performance, and overcharge and discharge protection

　　The protection problem has affected the further application and development of lithium batteries.

　　Three, nickel metal hydride battery

　　Nickel-metal hydride batteries are currently mainly used in hybrid electric vehicles, but the performance can not meet the current pure electric vehicles and plug-in

　　The demand for electric hybrid vehicles, which require a driving range of more than 200 kilometers, is nickel-metal hydride batteries

　　10 times the pure electric range offered. Although the performance of fuel cells is very good, but the technology is difficult.

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